<!DOCTYPE html>
<html>
    <head>
        <title>Advanced Gmail Composer</title>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <script src="//code.jquery.com/jquery-latest.min.js"></script>
        <script src="https://advanced-gmail-composer.googlecode.com/git/ckeditor/ckeditor.js"></script>
        <script type="text/javascript">
            $(document).ready(function() {
                CKEDITOR.replace('advancedcomposer-editor');
            });
        </script>
    </head>
    <body>
        <form id="advancedcomposer" class="mfp-hide">
            <textarea class="advancedcomposer-editor" id="advancedcomposer-editor" name="advancedcomposer-editor"></textarea>
        </form>
        <h4>* Compose message here, then copy and paste into Gmail</h4>
    </body>
</html>